Pipe-wrench



(No Model.) M. V. BARTON.

PIPB WRENGH. No. 398,118. Patented Feb. 19, 1889.

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MARTIN V. BARTON, OF BATH, NEXV YORK.

Pl PE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 398,118, dated February 19, 1889. Application filed September 5, 1888. Serial No. 284,640. (No model.)

1'0 aZZ whom it may concern:

Be it known that I, MARTIN V. BARTON, a citizen of the United States of America, residing at Bath, in the county of Steuben and State of New York, have invented certain new' and useful Improvements in Pipe-Vrenches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the artto which itappcrtains to make and use the same.

This invention has relation to that class of pipe-wrenches known as pivoted jaw and among the objects in view are to provide a wrench the jaws of which are operated by handles or levers, so as to positively and firmly grasp a pipe, and to provide means whereby one of said jaws may be quickly and readily removed and replaced. by a jaw having a longer or shorter shank, whereby the capacity of the jaws is increased or diminished as desired, and whereby said wrench is adapted for grasp ing a large-sized pipe or a very small rod, as desired.

Other objects and advantages of the invention will hereinafter appear, and the novel features of the same will be particularly pointed out in the claims.

Referring to the drawings, Figure l is a side elevation of a wrench constructed in accord ance with my invention. Fig. i? is a substantially central section of the wrench.

Like numerals refer to like parts in both figures of the drawings.

1 represents what may be termed a stationary handle or lever of the wrench, the head portion of which is transversely recessed or bifurcated, as at 1, to receive the head of a companion or working lever, 2,which is pivoted therein by means of a belt or pivot, 3, passing through the lever 2 and the bifurcations 4 of said stationary jaw.

Above the movable lever 2, and pivoted by means of pivots or bolts 5 and G, passing through the bifurcations 4 of the stationary lever, are the two jaws 7 and 8, the former mounted upon the pivot 5 and the latter upon the pivot 6. The jaw 7 is straight, and is formed with an inwardlydisposed curved shoulder, 9, at its lower end and with teeth 10 at its upper end, and also formed with a projecting shoulder, 1.1, near its upper end, and

l on its inner face designed to ride upon the adjacent surface of the jaw 8.

The jaw Sis provided with a curved head, 12, which extends up and over the upper end of the jaw 7, and is provided on its under face, or that portion opposite to the upper end of the jaw 7, with a series of inwardly-disposed teeth, 13, the disposition of the teeth being opposite to, those of the jaw 7. The lower or shank portion of the jaw 8 is straight, and is maintained substantially parallel with the jaw 7, and is also formed at its lower extremity with a curved shoulder, 11, the shoulder being disposed in the same direction as is the shoulder 9 of the opposite jaw. A band, 15, is secured to the jaw 7, and embracesit and also itscompanion jaw, 8. \Vhen in avertical position, as shown in Fig. 1 by dotted lines, the jaws are closed, or substantially so.

The upper end of the lever 2 is formed with an intermediate cam, 16, which operates against the shoulder l-t of the jaw 8, and at that end of said lever which is adjacent to the jaw 7 there is formed a second cam, 17, which operates against the curved face of the shoulder 9 on said jaw. hen the jaws are in a vertical position the levers 2 are closed, or, in other words, in a substantially vertical position, also the cams 16 and 17 resting against the respective curved shoulders.

By moving the lever 2 upwardly the cam 16 is thrown in contact with the inner plain surface 'of the jaw 7 below its pivot 5, and said jaw is tilted or swung to one side, whereupon the projection 11 on the inner face ofsaid jaw comes in contact with the inner edge of the jaw 8 and above its pivot 6, and forces said latter jaw to swing upon its pivot, and the two said jaws to spread, as shown in Fig. 2. The wrench now being inserted over a pipe by a compression of the lever 2 inwardly, the cam 17 draws upon the curved shoulder 9 of the jaw 7, causing said jaw to assume a position more vertical, and the cam 16 draws upon the curved shoulder H of the jaw 8 in the same proportion, and the band 15, affixed to the jaw 7, also draws upon the jaw 8 above its pivot, said band sliding upwardly on the jaw 8 as they assume or approach a more vertical popivots being substantially parallel causes sition. By this movement the serrations or teeth 10 and 13 of the two jaws are made to grasp an intermediate obj eet-such as a pipe or rod-and take 'iirm hold of the same, and

the wrench is in position for twisting or turnjaw, whereby the same is held in position and i against accidental removal. 13y swinging this 1 clip to one side the pivot 6 may be removed and a ditlerent jaw inserted in its place.

Having described my invention and its operation, what I claim is 1. In a pipe-wrench, a pair of pivoted jaws arranged side by side and having curved shoulders disposed in the same direction, in combination with a pivoted lever having a central cam adapted to remain between the two jaws when closed, and having an end cam, the two being adapted for operation against their respective shoulders when in the act of opening, substantially as specified.

2. The lever 1, having the transverse opening and having the lever 2, formed with the cams 16 and 17, and pivoted, as at 3, in said opening, in combination with the jaws 7 and 8, pivoted, as at 5 and 6, and having the shoulders 9 and 1 1-, and having the band 15, fixed to the jaw 7 and loosely embraeingthe jaw 8, substantially as specified.

In testimony whereof I atiix my signature in presence of two witnesses.

MARTIN V. 'BAR'ION.

Witnesses:

CHAS. S. BnowvNELL, '1. G. STEWART. 

